2-Butanone, 3-bromo- → 6,8-Dibromo-2,3-dimethylimidazo[1,2-a]pyridine

Participants

Reaction Steps

A mixture of 31.8 g of 2-amino-3,5-dibromopyridine, 22 g of 3-bromo-2-butanone and 350 ml of tetrahydrofuran is heated to reflux for 9 days, and the precipitate formed is filtered off and dried in vacuo. It is then suspended in 1 l of water and the suspension is adjusted to pH 8 using 6 molar aqueous sodium hydroxide solution. The precipitate formed here is filtered off and washed with water. 28 g of the title compound of melting point over 90° C. (sintering) are obtained.

Provenance & Evidence